The Thomas Reburn Polygonal Barn is an historic building located near New Albin in rural Allamakee County, Iowa, United States. It was built in 1914 as a beef cattle barn. The building measures 46 feet (14 m) in diameter. It is a 12-sided structure that features red vertical siding and a silo that extends one story through the roof. It is one of four known barns in the round barn genre that was built with a flat or near flat roof in Iowa. It has been listed on the National Register of Historic Places since 1986.
The James Greer McQuilkin Round Barn is a historic building located near Eagle Center in rural Benton County, Iowa, United States. It was built in 1918 for James Greer McQuilkin. He farmed and sold barns that were designed by Johnston Brothers' Clay Works. The building is a true round barn that measures 60 feet (18 m) in diameter. The barn is constructed of clay tile and features a hay dormer on the north side. The structure does not have a cupola, but has a silo that rises from the center. A new metal roof was added in 1998. It has been listed on the National Register of Historic Places since 1986.
The Round Barn, Washington Township is a historic building located south of Janesville, Iowa in Black Hawk County, United States. It was built in 1917 as a dairy barn. The building is a true round barn that measures 60 feet (18 m) in diameter. The structure is constructed in clay tile and features an aerator and a two-pitch roof. It was built around a silo with a water tank on top of it. While that is typical of this type of structure, it is the only one known to exist in Iowa. It has been listed on the National Register of Historic Places since 1986.
The Robert Kirkpatrick Round Barn is a historic building located near Coggon in rural Delaware County, Iowa, United States. It was built in 1919 by Robert Kirkpatrick on his own farm. The building is a true round barn that measures 60 feet (18 m) in diameter. The barn is constructed of clay tiles and features a two-pitch roof with a large hay dormer on the east side and two smaller dormers on the west and north. It is one of 16 clay tile barns that were based on a design from the Johnson Brothers Clay Works in Fort Dodge, Iowa. The use of hollow clay tile is a distinctive trait in the construction of Iowa's round barns. For many years it was used as a dairy barn before becoming a horse barn. It has been listed on the National Register of Historic Places since 2005.
The Grimes Octagon Barn is an historic building located near West Union in rural Fayette County, Iowa, United States. It was built by Joe Butler in 1880 for M.W. Grimes. The building is an octagon that measures 65 feet (20 m) in diameter. It is one of 14 known 19th-century octagon barns that still exist on an Iowa farm. The barn features red metal siding, a roof composed of wedge-shaped sections and a hay dormer. The sectional roof marks it as a Stewart type that was named for the New York farmer and agricultural editor Elliott W. Stewart, who designed the prototype in 1874. The barn has been listed on the National Register of Historic Places since 1986.
The Spotts Round Barn is a historic building located near Charles City in rural Floyd County, Iowa, United States. It was built in 1914 as a dairy and horse barn. Its design was influenced by the Iowa Agricultural Experiment Station. The building is a true round barn that measures 55 feet (17 m) in diameter. It is constructed of clay tile from the Johnston Brothers Clay Works. It features a two-pitch roof, a large hay dormer on the north side and a 12-foot (3.7 m) central silo. The barn has been listed on the National Register of Historic Places since 1986.
The Nelson Round Barn is a historic building located near Allerton in rural Wayne County, Iowa, United States. It was built in 1912, and it was originally used as a dairy barn. The building is a true round barn that measures 50 feet (15 m) in diameter. It features white vertical siding, an aerator, and a conical roof. The barn has been listed on the National Register of Historic Places since 1986.
The Tonsfeldt Round Barn is a historic building located on the Plymouth County Fairgrounds in LeMars, Iowa, United States. It was built in 1918 to house H.P. Tonsfeldt's purebread Polled Hereford cattle, and prize bull, on his farm west of the city. The building is a true round barn that measures 82 by 68 feet. The barn features white horizontal siding, an aerator and a Gothic curved roof. The self-supporting Gothic-arch dome of this barn is a unique feature on Iowa's round barns. In 1981 the barn was moved from the farm to the fairgrounds in order to preserve it. It is now used for exhibit space. The barn has been listed on the National Register of Historic Places since 1986.
The George Darrow Round Barn is a historic building located near Alta Vista in rural Chickasaw County, Iowa, United States. The true round barn was constructed of clay tile in 1916. The use of clay tiles suggests that it was influenced by the work of the Iowa Agricultural Experiment Station in the early 20th century. It has a diameter 64 feet (20 m), and a height of 50 feet (15 m). The barn features a two-pitch roof and a 14-foot (4.3 m) central clay tile silo. It was built as a dairy barn and it was used as such until 1978. Dairy cow stanchions surround the central silo on one side of the barn in a circular arrangement, and horse stalls surround the other side. The barn has been listed on the National Register of Historic Places (NRHP) since 1986. It has subsequently been torn down. It was removed from the NRHP in 2022.
The Holtkamp Round Barn is a historic building located near Salem in rural Henry County, Iowa, United States. It was built in 1918 by its first owner B.J. Holtkamp who used the plans drawn up by Matt L. King. The building is a true round barn that measures 50 feet (15 m) in diameter. It is constructed of clay tile from Mt. Pleasant Brick & Tile Mfg. Co. of Mt. Pleasant, Iowa and features an aerator, hay carrier, and a two-pitch roof. It has been listed on the National Register of Historic Places since 1986.
The Dyas Hexagonal Barn is a historical building located near Bellevue in rural Jackson County, Iowa, United States. Built in 1921, it is a round barn measuring 50 feet (15 m) around, with red horizontal siding on a stone foundation, a tin roof, and a central wood stave silo extending through the roof. Despite the common name, the building is actually eight-sided, and is also known as the Dyas Octagonal Barn. Originally the roof was flat or almost flat; it is one of four round barns known to have been built on the same farm. It has been listed on the National Register of Historic Places since 1986.
The Dobbin Round Barn is a historic building located near State Center in rural Marshall County, Iowa, United States. The true round barn was built in 1919 by Ike Ingersol and Amos Thomson. It was built from a Gordon Van Tine Co. kit for $6,000. It features white vertical siding, a two-pitch roof, louvered cupola and a 12-foot (3.7 m) diameter central silo. The barn has a diameter of 60 feet (18 m). It was built as a dairy and horse barn. The barn has been listed on the National Register of Historic Places since 1986. It is currently owned by Daniel Dobbin.
The Round Barn, Washington Township is a historic building located near Sciola in rural Montgomery County, Iowa, United States. It was built in 1917 as a hog barn. Typical of a barn built for this use in features a multitude of windows on the wall and on the cupola, which provided light and ventilation. The building is a 24-sided structure that measures 60 feet (18 m) in diameter. The barn features red vertical siding, a 12-section cupola, and a two-pitch sectional roof. It has been listed on the National Register of Historic Places since 1986.
The Round Barn, Buckingham Township is an historic building located north of Traer in Tama County, Iowa, United States. It was built in 1920 as a general purpose barn. The building is a true round barn that measures 50 feet (15 m) in diameter. The structure is constructed in clay tile from the Johnston Brothers' Clay Works and features an aerator and a segmented two-pitch roof. It has been listed on the National Register of Historic Places since 1986.
The John W. Young Round Barn is an historic building located near Traer in rural Tama County, Iowa, United States. It was built in 1917 by Joe Seda as a general purpose barn. The building is a true round barn that measures 65 feet (20 m) in diameter. The structure is constructed in clay tile and features a two-pitch roof and an 18-foot (5.5 m) central silo that is 45 feet (14 m) high. It has been listed on the National Register of Historic Places since 1986.
The Wickfield Round Barn is a historic sale barn building located near Cantril in rural Van Buren County, Iowa, United States. Originally called Silvers Sale Pavilion, it was built in 1919 by Alva Hunt for $20,000. The true round barn measures 50 feet (15 m) in diameter. Frank Silvers, a successful hog breeder and businessman, operated the largest Hampshire hog farm in the world. The first floor had seating for 700 people. Silvers' business offices were also located on the first floor. The structure is constructed of clay tile and features an aerator. The two-pitch roof features eight dormers on the lower part and four dormers on the upper part of the roof. It has been listed on the National Register of Historic Places since 1986. There are no round barns in Iowa used as sale barns any longer, and this one is used for storage.
The William Oakland Round Barn is an historic building located near Blairsburg in rural Hamilton County, Iowa, United States. The true round barn measures 50 feet (15 m) in diameter. It is constructed of clay tiles and features a conical roof, aerator, a small dormer on the west side and a larger one on the east side as well as a 16 feet (4.9 m) central silo. William T. Oakland had this structure built in 1910 as a combination hog and sale barn. The ground floor was used for farrowing, while the sale ring was on the upper level. The 16 windows in roof provided light to the sales area. The barn has been listed on the National Register of Historic Places since 1986.
The Miller Round Barn was a historic building located near Sharon Center in rural Johnson County, Iowa, United States. It was constructed in 1918 by John Schrader. The bank barn that was built on a slope was an example of the Illinois Agricultural Experiment Station / H.E. Crouch type. The building was a true round barn that measured 60 feet (18 m) in diameter. It was covered in white vertical siding and features a two-pitch roof and a 10-foot (3.0 m) central silo. It was listed on the National Register of Historic Places since 1986. The barn has subsequently been torn down.
The Round Barn, Millville Township is an historical building located in rural Clayton County, Iowa, United States. It was built in 1916 as a general purpose barn. The building is a true round barn that measures 72 feet (22 m) in diameter. It is covered in metal vertical siding and features a dome roof, a cupola with an aerator and a central silo. It is one of three round barns extant in Iowa known to have a dome roof. The barn has been listed on the National Register of Historic Places since 1986.
John McGreer Barn and Crib are a historic building (barn) and structure located in rural Harrison Township, Lee County, Iowa, United States. They are located on a farm northwest of the town of Donnellson. The agricultural buildings were listed on the National Register of Historic Places in 2001.
